is it me or him.


so me and my boyfriend have been having sex a lot. usually we have sex in his room and everything is great. recently we have been having to have sex in his car because his brother moved in his room with him. the first time in the car was good, it was a little uncomfortable but we both managed. btw my boyfriend is about 6'3 so he's really tall. anyways the past 3 timed we have tried to have sex he hasn't been able to keep an erection or even have one. I am starting to feel insecure because I feel like I am not good enough. he keeps telling me it's not me and it's only because the car is small and he is uncomfortable but I guess my insecurities make me feel like it's me. has anyone experienced this problem? is it really because of the car or is it me ?